Friedbich ruppel



No. 62!,463. F RU-PPEL Patented Mar; 2|, I899.

KIL'N FOR CEMENT, LIME, 8w.

1 (Application filed Sept. 16, 1898.)

(No Model.)

i E 5% Di PHOTO-LIYHQ-. WASFINQTON, 0. c1

UNITED STATES ATENT Gr mes.

FRIEDRICH RUPPEL, OF LAGERDORF, GERMANY.

K'ILN FOR CEMENT, LIME, 86C.

SPECIFICATION forming part of Letters Patent No. 621,463, dated March21, 1899.

Application filed September 16, 1898. $erial No. 691,078. N 1 1061810 T0aZZ whom it may concern:

Be it known that I, FRIEDRICH RUPPEL, a citizen of the German Empire,and a resident of Lagerdorf, (Holsteim) Germany, have invented certainnew and useful Improvements in Kilns for Cement, Lime, and the Like, ofwhich the following is a specification.

This invention relates to improvements in continuous shaft-kilnsemployed in the manufacture of cement, lime, and the like,whereby theefficiency of the said kilns is doubled with a given consumption ofcoal, the Working is rendered more regular, and the work is made easierand cheaper than heretofore.

A kiln provided with these improvements is illustrated in theaccompanying drawings, in which- Figure 1 is a vertical section on theline mm of Fig. 2. Fig. 2 is avertical section on the line 3 3 of Fig.1; and Fig. 3 is a plan, partly in section, on the line z a, Fig. 2.Fig. 4 is a plan illustrating the frame which constitutes the chargingdevice for the kiln.

The kiln consists of a combustion-chamber A, charge-shaft B, flue O,chimney D, and drying-chambers F and G. The combustionchamber A isbounded at its lower part by the grate a, under which there isindicated, by way of example, the nozzle 10 of a blower. Thecharging-shaft- B forms a vertical extension of the combustion-chamberA, while the flue O-branches off laterally and to the rear. In thecharging-shaft there is arranged the charging device, which, incombination with the charge for the time being, serves also as a meansof closing the charging-shaft. The charging device, Figs. 1 and 4,consists of a frame I), which is suspended by chains If and in whichthere are arranged trap-doors 1) 12 which open downwardly and which canbe kept closed by the pull of the chain a. The frame I) is adapted torise and fall readily with a sufficient amount of play in thecharging-shaft.

The dry raw material is piled up, together with the fuel, in suitableproportions upon the closed frame, and for the purpose of facilitatingthe operation the frame can be raised and gradually lowered. The frameforms, together with the piled-up charge, the closure of the kiln, whichmay, however, be effected by other means. The discharge is effected inan extremely-simple manner by slacking the chain a, so that thetrap-doors will open automatically by their own weight and by the weightof the charge resting thereon, so as to allow the charge to fall downinto the chamber A. As soon as this is done the trap-doors are againinstantly closed by pulling the chain u, and the charging device israised for the purpose of introducing the next charge.

In the lower portion of the chimney connected to the fine 0 there arearranged draftbaffles, Figs. 1 and 2, in the form of built-in arches cl,which present a restricted area of passage to the fire-gases and areintended to keep the heat of said gases as long as possible in the kiln.After passing these baffles the heating-gases are led to the right or tothe left laterally through one of the dryingchambers F or G, Fig. 2.These dryingchambers are. arranged on two opposite sides of the chimneyat such a height that the drying-hurdles h can be rolleddirectly to thecharging-place. For the purpose of forming the drying-chambers thechimney D is closed at about the height of the upper story by means of astrong roof is, which may be reached, having lateralextensions in theform of tongues which project into the chambers F and G to such anextent as to compel the fire-gases to traverse the drying-chambersthroughout their entire extent. Below the roof is there are provided inthe masonry of the chimney openings f g, by means of which thedrying-chambers communicate with the interior of the chimney. Theopenings f g are adapted to be closed by means of registers m at, ofwhich the upper ones 0% are balanced by Weights m, while the lowerregisters n are simply moved from the side. In the drying-chambers,which are accessible from the outside by means of doors 0, there areprovided rails or other devices for facilitating the transport of thedrying-hurdles. The arrangement of two drying-chambers is advantageous,because preventing interruption in the working, so that when onedryingchamber is being emptied and recharged the fire-gases can be ledthrough the other cham; ber, while this last chamber is protectedagainst the entrance of gases by means of the closed dampers.

The operation of the kiln is as follows:

ICO

While heretofore the wet raw material which has been formed into bricksby a brick-making press had to be properly dried in separate apparatus,the said raw material can now, in the case of the kiln hereind'escribed,be raised in the wet state onto the upper platform and berolled on the hurdles h into the correspondin g drying-chamber. The rawmaterial when properly dried and heated is brought out of thedrying-chamber directly into the kiln, being piled,together with thefue1,upon the trapdoors of the frame I), so as to be allowed to fallat agiven moment into the burning-chamber A. The finished product fills theinterstices of the grate a and is drawn out therefrom.

The use of air delivered from a blower which can be introduced,according to the nature of the raw material, at different places in theburning-chamber is advisable, especially for the purpose of artificiallyincreasing the draft in the case of easily-crumbling material.

Having now particularlydescribed and ascertained the nature of the saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is-- 1. In a kiln, the combination of a combustion-chamberwith a charging-shaft communicating therewith,- a charging deviceVertically movable within the shaft, a flue also communicating with thecombustion-chamber, baflies contained therein, a pair ofdrying-chambers, a roof within the flue which projects into each of thedrying-chambers,and dampers between such chambers and the flue,substantially as specified.

2. In a kiln, the combination of a combustion-chamber with acharging-shaft communicating therewith,and a charging device verticallymovable within the shaft and composed of a frame,a pair of trap-doorshinged thereto, and chains for operating said trap-doors, substantiallyas specified.

3. In a kiln, the combination of a combustion-chamber with acharging-shaft communicating therewith, a charging device provided withtrap-doors and movable within the shaft, a flue, a pair ofdrying-chambers comm unicating therewith, and dampers between saidchambers and the flue, substantially as specified.

Signed by me, at Hamburg, this 27th day of August, 1898 FRIEDRICHRUPPEL.

\Vitnesses:

\V. '1. E. KOCH, T. GoTHs.

